Mexico's Pemex says has shut catalytic plant at top refinery

MEXICO CITY, June 28 (Reuters) - Mexico's state-owned oil
company Pemex said on Tuesday that it has ordered a
"preventative shut down" of the catalytic unit at its Salina
Cruz refinery due to smoke detected at the plant.

The refinery is the company's largest with a capacity to
process 330,000 barrels of crude per day.
(Reporting by David Alire Garcia)